Shut-off valve



C. E. SENNA.

SHUT-OPP VALVE..

Patented Sept. 8, 1896.

NITED STATES f ATENT Fries.,

SH UT-OFF VALVE.

SPECIFICATION forming part of Letters Patent No. 567,200, dated September 8,'1896.

Application ledrctober-SO, 1895. Serial N0. 567,365. (No model.)

To all whom, t may concern: y

Be it known that I, CHARLES E. SENN'A, of Boston, in the county of Suffolk and State of Massachusetts, haveV invented certain new and useful Improvements in Shut-Off Valves', of which the following is a speciiication.

This invention has for its object to provide a simple, durable, and effective sh ut-off valve affording a straight passage to permit the use of a thaw-Out iron, and adapted to be used also as a drip-valve.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure l represents a side View of my improved shut-off valve. Fig. 2 represents an edge View ofA the same.

Fig. 3 represents a View similar to Fig. l, one

My improved shut-off valve is composed of three general parts, namely, two plates or casing members ci a and a disk or valve c, interposed between the said casing members and adapted to oscillate, the inner sides of the casing members being provided with circular Seats, which closely iit the sides of said disk. Each of the casing members hasin its inner side a circular orifice a2, which receives a compressible disk or valve-'seat proper, c, said disk being of leather or other suitable material and having a thickness less than the depth of the recess a2, so that not only the said disks, but also the edges of the periphery of the valve b, are received in said recesses and are guided thereby. The surface of the recess a2 is provided with raised ribs as, which are formed to indent the seat c and thus prevent water froml finding its way between the seat c and the casing member on which it bears, portions of said ribs being irregularly arranged or nonconcentric in such manner as to prevent the seat from turning on the casing member, the general arrangement of the'ribs being such that they form a wallsurrounding the ports, hereinafter described, extendingthrough the casing members, so that they form water-tight joints entirely surrounding said ports and preventing the water from working its way outwardly from said ports between the casing members and the seats. Each of the casing members has a port a4, said ports being arranged at one side ofthe centers of the seats c, or, in other words, eccentrically to said seats, 'and being'in line with each other, as shown in Fig. 4.. Internally-threaded bosses or nipples a5, formed on the casing members, surround the ports CL4 and extend outwardly from the casing members for connection with pipes (i6. The 'casing members are provided on their peripheries with ears al, the ears on the member a being screw-threaded to engage connecting-screws d,whereby the casing members are adjustably connected and caused to bear with any desired degree of pressure upon the sides of the disk b.

The disk b is formed to closely fit the recesses a2 and the seats c c, and is provided on its sides with annular indenting-ribs b', which indent the seats o o near the margins thereof and coperate with said .seats in forming Water-tight joints. The disk has a port b2 extending through it and a handle b3 projecting from its periphery between the casing members, said handle being adapted to oscillate with the disk between the shoulders a8 as, formed on the inner sides of the casing members. When the disk and handle are at one extreme of their movement, 'the port b2 coincides with the ports a4 of the casing, the valve being thus Opened. Vhen the disk is at the other extreme of its movement, the port b2 is separated from the ports a4, as shown in Fig. 4..

Vhen it is desired to use the device as a drip-valve, the disk is provided with a drippassage b5, extending from one sideof the disk to the periphery thereof, and arranged so that when the disk is in its closed position the passage will coincide with one of the ports a4 and will discharge through the periphery of the disk between the casing members, as shown in Fig. i. The drip-passage is arranged at such distance from the port b2 that when IOO the valve is in a position about midway beu tween the two extremes of its movement it will entirely close the conduit, both the port b2 and the drip-passage being entirely disconnected from said conduit. The plate ais provided with fingers d10, which bear upon the periphery of the plate a' and upon the ears a7 on said plate in such manner as to prevent independent rotation of either plate, the said fingers and ears interlocking for this purpose. The fingers are intended to coperate with the screws d for the purpose above stated, thus preventing the strain that may be eX- erted when a pipe is being screwed into one of the nipples a5 from being sustained entirely by the screws. I prefer to provide one of the plates with a stud @12, Fio. 6, projecting into an orifice 197 in the center of the disk h. It will be seen that the plates a a are separated from each other, so that their inward movement is limited only by'the disk b. Hence said plates can be pressed with any desired degree of force against the disk, so that wear of the seats and of the disk can be readily compensated for from time to time, as may be found desirable. The construction is simple and effective, and affords a straight passage for the insertion of a thawing-tool.

I claiml. A shut-off valve comprising two plates or casing members, each having in its inner side a recess having non-concentric seat-indenting ridges, and a compressible valve-seat inserted in said recess and of less thickness than the depth of the recess, said members also having eccentricallyarranged ports extending` through said valve-seats; a disk interposed between said members and adapted to oscillate on said seats, said disk having Seat-indenting annular ridges on its sides, and an eccentrically-arran ged port adapted to coincide with the ports in the casing members, the indenting-ridges of the casing members and disk being formed to surround the several ports and prevent leakage between the disk and casing members; and means for adjustably connecting the casing members outside of the periphery of the disk.

2( A shutoff valve comprising two plates having circular seats on their inner sides and havin g the ears a7, ports eccentric to said seats screws adj ustably connecting the ears a7; projections d10 integral with one plate and arranged to engage the periphery of the other plate each side of the ears to cooperate with said screws in preventing independent rotation of either plate; and a disk interposed between the plates and provided with an eccentric port and with an operating lever or handle.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 23d day of October, A. D. 1895.

CHARLES E. SENNA.

lVitnesses:

Gno. W. ArrLn'roN, VALTER E. BAKER. 

